There are two common image viewing controls in VB, Picture Box, and Image Control.
If you use the Picture Box, then you need to fit the image before you load it into the control.
If you use the Image Control, then all you need to do is set the property Stretch = True.
Its been a couple of months since I have worked with images, but I also have some image manipulation code around somewhere. Let me know if I can be of further assistance.